TRADING ACTIVITIES AND RELATED RISKS, Derivatives by Instrument Type (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	$ (15,505,884)	$ 18,485,583	$ (38,733,066)
Agriculture Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	(5,771,645)	(11,531,115)	(13,356,428)
Energy Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	6,250,244	(6,159,544)	(28,402,841)
Metal Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	(6,296,571)	32,529	(13,161,193)
Stock Indices Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	(21,337,033)	67,385,104	2,224,293
Short-Term Interest Rate Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	4,514,708	(2,171,497)	(3,042,015)
Long-Term Interest Rate Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	146,933	(11,990,475)	20,940,454
Forward Currency Contracts [Member]
Gains (Losses) Recognized in Income, Net [Abstract]
Trading gains (losses)	$ 6,987,480	$ (17,079,419)	$ (3,935,336)